The N64 is now the oldest console able to run Linux.
Some previous attempted had been done in the past but never went as far as having a shell running. The port uses musl and busybox to make it as lightweight as possible, although the OOM is never far away with 4MB of memory in 2020.
GitHub release: https://github.com/clbr/n64bootloader/tree/master/n64linux
In depth description of the N64 architecture: https://www.copetti.org/writings/consoles/nintendo-64/